Feed mechanism for saw-mills



2 Sheets- Sheet 1.

A. B. LANDIS, FEED MECHANISM FOR SAW MILLS.

(No Model.)

No. 357,087. Patented Feb. 1,1887.

(No Model.) 2Sheets-Sheet 2. I A. B. LAND-IS. FEED MECHANISM FORSAW'MILLS.

N0. 357,087. Patented Feb. 1, 1887-.

N. PETERS. Phclmunm m hen washin mm n. C.

UNiTED STATE-s PATENT OFFICE.

ABRAHAM B. LANDIS, OF WAYNESBQROUGH, PENNSYLVANIA.

FEED MECHANISM FOR SAW-MILLS.

SPECIFICATION forming part of Letters Patent No. 357,087, dated February1, 188 7.

Application filed July 1, 1886. Serial No. 206,894. (No model To allwhom it may concern:

e it known that I, ABRAHAM B. LANDIs, a citizen of theUnited States,residing at Waynesborough, in the county of Franklin and State ofPennsylvania, have invented certain ,new

wheel adapted to travel on its face by means so that the frictionbetween the frictional surfaces is automatically maintained by the powertransmitted, so that the friction increases and decreases in the sameratio as the load; also,to provide an automatically-reversing saw-millcarriage driven by the same friction-feed. I

attain these objects by the mechanism illustrated in the accompanyingdrawings, in which-- v Figure 1 isa top view, partly in section, of avariable-feed mechanism constructed inaccordance with my invention. Fig.2 is an elevation of the same. Fig. 3 is a top view 'show ing the planof mounting said feed upon the husk or frame of the sawmill and itsautomatic reversing feature by the saw-mill carriage. Fig. 4 is anelevation of the same.

Like letters represent like parts in all the drawings.

In the drawings, A represents a disk having a flat surface with a rimprojecting for the travel of the small wheel a, which disk is mountedupon one end of a shaft, B, retained in suitable bearings of frame B,carrying a pulley, B, through which motion is transmitted to the feedmechanism, to be hereinafter described.

G is a frame with bearings carrying shaft 0, upon which is mounted thefriction-wheel A for the feed and the'wheel a for the gig-back movementof the log-carriage. Said frame 0 is mounted upon two swinging links orbrackets, D and D, the latter being fixed. to the upright shaft D towhich is attached the handlever D The other part of frame 0 rests on thesupport 0 and is held by a bolt and allowed to slide in the curved slotshown. This support 0 is an extension or a part of the bearing in whichthe shaft a? revolves, forming a connection between said shaft and saidframe 0, preventing the gearing a and a from separating, being held downby the bolt shown, and said frame 0 allowed to slide, as stated, in

the curved slot. A bevel-pinion, a, is mounted on shaft 0, which engageswith bevel-gear a, mounted upon a shaft, a, and upon the same shaft ismounted the spur-pinion a, which engages with spur-gear a mounted on thepinion-shaft a, which drives the logscarriage.

The feed of the log-carriage is varied by sliding the feed-wheel A onthe shaft 0 by means of a lever, A coupled to the hub of said feed-wheelat one end,cthe other end being coupled to .frame 0 by joint A. A bar, Ais attached to this lever, which is toothed at one end for theengagement of ascroll-gear,

b, which is mounted upon a shaft having a crank or hand-wheel at itsupper end. It will be seen that by turning said crank in eitherdirection the feed-wheel A will be drawn toward and from the center ofsaid disk,thus readily varying the feed while feeding or otherwise, andwill remain fixed until changed by said crank. A sliding bar couplingdirect from feed-wheel A to scroll-gear 1) could be used instead of thelever A and bar A. The friction-wheel a is smaller thanwheel A, and isused for the gig-back movement of the logcarriage, which, traveling onthe rim of the disk, gives the quick motion necessary for that purpose.

The reversing is accomplished by the lever D", which gives the circularmovement to frame 0, (shown by dotted line y y in Fig. 1,) which isproduced by thelinks D and D. This movement, it will be seen, bringseither wheel in contact with the disk, the feed-wheel A coming incontact by the circular movement of the frame in one direction and thegig-back wheel a escaping, owing to the bevel of its face, (so made toget perfect rollingsurface.) The reverse movement of the framedisengages the' feed-wheel A and brings the gig-back wheel a in contactwith the.

rim of the disk owing to its bevel.

I Instead of swinging the frame 0 by links, it might be slid in angularguides or radial slots and accomplish the same purpose without departingfrom the spirit of my invention; butI prefer the links or brackets, asthey produce the least friction.

The power transmitted by the disk revolves shaft 0, which carriesbevel-pinion a, which meshes into bevel-gear a", which revolves pinion awhich meshes into spur-gear a on pinion-shaft a and drives thelog-carriage. It will be seen that in transmitting the power from piniona to spur-gear a it exerts an endthrust to the frame G, which, owing toits circular movement, presses the wheel A against the disk in onemotion andthe wheel aagainst the rim of the disk in the other motion,making the friction between these surfaces automatic, so that there isno need, after reversing for either movement, forholding the lever D asthe friction is automatically retained and increased and decreased inthe same ratio as the power transmitted. A set-screw, B", is provided atthe end of the disk-shaft B for the purpose of adjusting the disk to thefriction-wheels as they become worn.

. In Figs. 3 and 4 the automatic reversing device is shown in connectionwith the alreadydescribed feed, also the general plan of mounting saidfeed upon the saw-mill frame. The rod d connects at one end to an arm,(1, on upright shaft D and at the other end to a centrally-pivoted bar,(1, which has on each end a small friction-roller, (P.

In the drawings, Figs. 1 and 3, the friction is in contact for thegig-back, which moves the carriage from the saw. A tripper, E, made ofsuch form as will allow it to spring,is fastened on the carriage E, oneat each end, at a point where it is desired to reverse the motion of thecarriage. This tripper, it will be seen, comes in contactwith the roller(i moves the arm at, and, by its connection with rod d, it moves shaftD", and, owing to the circular movement of the frame O,brings thefeed-wheel in contact with the disk and drives the logcarriage in theopposite direction, and as the friction is automatically retained thecarriage movement is positive in either direction.

It will be seen that with my device and manner of mounting it I employ abelt from a pulley, f, on the saw-arbor f to drive it with the pulleynext to the saw-arbor box, consequently avoiding end-thrusts andspringing of the sawarbor.

Having nowdescribed my invention, what I desire to secure by LettersPatent, is

1. In a variable-feed mechanism, a disk, in combination with a framehaving a circular movement, links D and D, connecting the main framewith the moving frame, the latter carrying a shaft, and a feed-wheeladapted to be moved longitudinally in said frame and to travel on theface of said disk, substantially as and for the purpose described.

2. In a feed mechanism, a disk, in combina tion with a movable frame,links connecting both ends of said movable frame to the main frame, ashaft carried by said movable frame, a wheel adapted to travel on theface of said disk, and a wheel adapted to travel on the rim of saiddisk, said frame having an end-thrust in either direction, automaticallyretaining the friction between the frictional surfaces, substantially asdescribed.

3. In a feed mechanism, a disk, in combination with a frame movable upona curved path and carrying a shaft, and upon said shaft a wheel adaptedto travel on the face of said disk, and a pinion, a, the latter workingwith the gear a, carried by said frame, an end-thrust being produced bythe transmission of the power from pinion a to gear-wheel a therebyautomatically retaining the friction between the frictional surfaces,substantially as and for the purpose described.

4. In a feed mechanism, a disk, in combination with a movable framecarrying a wheel adapted to travel on the face of said disk, links D D,or their equivalent, connecting frame 0 to frame B, for the purpose ofengaging and disengaging said wheel with said disk by their circularmovement, substantially as and for the purpose described.

5. In a feed mechanism, adisk, in combination with a movable frame,links connecting the main frame with both ends of the movable frame, thelatter carrying a feed-wheel and a gig-back wheel, which areautomatically held in contact with said disk, pinions a a" a, andgear-wheel a the upright shaft 1), arm (1 rod (1, the pivoted bar (1,and trippers E E on the log-carriage, substantially as and for thepurpose described.

In testimony whereof I have affixed my signature in presence of twowitnesses.

ABRAHAM I3. LANDIS.

Vitnesses:

D. M. Goon, J12, O. E. BESORE.

